固相球磨-水热法制备Mn_(1.56)Co_(0.96)Ni_(0.48)O_4纳米粉体及其NTC性能  

Preparation and NTC characterization of Mn_(1.56)Co_(0.96)Ni_(0.48)O_4 nanopowders by solid-state ball milling hydrothermal method

作　　者：马仁君[1,2] 常爱民[1,2] 高博[1,2] 孔雯雯[1,2] 夏军波[1,2] 

机构地区：[1]中国科学院特殊环境功能材料与器件重点实验室,新疆电子信息材料与器件重点实验室,中国科学院新疆理化技术研究所,乌鲁木齐830011 [2]中国科学院大学,北京100049

出　　处：《功能材料》2014年第20期20146-20149,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21103225);国家高技术研究发展计划(863计划)资助项目(2012AA091102);自治区青年科技创新人才培养工程青年博士科技人才培养资助项目(2013731022);中国科学院"西部之光"资助项目(XBBS201111)

摘　　要：采用固相球磨-水热法制备了Mn1.56Co0.96Ni0.48O4纳米粉体,研究了水热反应温度对产物粉体结构和形貌的影响,讨论了固相球磨-水热反应机理。采用X射线衍射仪、扫描电子显微镜和直流阻温测试仪对样品结构、形貌和电性能进行表征,结果表明固相球磨-水热法由于结合了固相球磨法和一步水热法的优势,因此可在低结晶温度下获得粒径小、分散度高的四方尖晶石结构纳米粉体。电学性能测试结果表明在193～373 K测试温区内,样品所制得陶瓷材料具有明显的负温度系数热敏电阻特性,材料常数B值处于3396～3 625 K。The Mn1.56Co0.96Ni0.48O4 nanopowders were prepared by solid-state ball milling hydrothermal method.The effects of hydrothermal temperature on structure and morphology of the powders were studied and synthesis mechanism of solid-state ball milling hydrothermal method was discussed.The structure and electrical properties of the prepared samples were characterized by X-ray diffraction（XRD）,Scanning electron microscope（SEM） and direct current（DC） resistance temperature measurement.Because it combines the advantages of the solid ball milling method and one-step hydrothermal method,the solid-state ball milling hydrothermal method can be applied to obtain smaller particle size and high dispersion of tetragonal spinel structure nanopowders at low crystallization temperatures.Electrical properties demonstrated that all ceramic samples prepared by the Mn1.56Co0.96Ni0.48O4 nanopowders have obviously negative temperature coefficient characteristics in a wide temperature range from 193 K to 373 K.The B values were in the range of 3 396-3625 K.

关 键 词：固相球磨-水热法 纳米粉体 Mn1.56Co0.96Ni0.48O4 负温度系数 热敏电阻 

分 类 号：TQ129.2[化学工程—无机化工]